CVE-2019-11706: Mozilla Thunderbird

High severity, CVSS 7.5. EPSS: 9.7% chance of exploitation in the next 30 days.

A flaw in Thunderbird's implementation of iCal causes a type confusion in icaltimezone_get_vtimezone_properties when processing certain email messages, resulting in a crash. This vulnerability affects Thunderbird < 60.7.1.

Affected products

• Mozilla Thunderbird: before 60.7.1 (fixed in 60.7.1)

Published 2019-07-23. Last modified 2026-06-17.